PileUpHashHelper.h

Go to the documentation of this file.

/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef PILEUPTOOLS_PILEUPHASHHELPER_H
#define PILEUPTOOLS_PILEUPHASHHELPER_H

 
#include <sstream>
 
#include <uuid/uuid.h>
 
#include <xAODEventInfo/EventInfo.h>
 
class PileUpHashHelper
{
public:
  PileUpHashHelper() {}

  void addToHashSource(const std::string &string);

  void addToHashSource(const xAOD::EventInfo *eventInfo);

  void clearHashSource();

  std::string hashSource() const { return m_stream.str(); }

  void calculateHash(uuid_t &hash) const;

  static xAOD::EventInfo::PileUpMixtureID uuidToPileUpMixtureId(const uuid_t &hash);

  static void pileUpMixtureIdToUuid(const xAOD::EventInfo::PileUpMixtureID &mixture,
                                    uuid_t &hash);

  static const uint16_t PILEUP_SIZE_BYTES = 8;
 
private:
  std::stringstream m_stream;
};
 
#endif // PILEUPTOOLS_PILEUPHASHHELPER_H